US1303702A

US1303702A - Machine-gttn fob

Info

Publication number: US1303702A
Authority: US
Publication date: 1919-05-13
Anticipated expiration: 1936-05-13

Description

W. F. MANGELS.

MACHINE GUN FOR SHOOTING GALLERIES.

APPLICATION FILED mm. mu.

1,303,702. Patented May 13,1919. s snegrs-suzn 1.

WITNESSES uvm/ron M///am/.7/dnge/ WUu/w. B y

ATTORNEYS W. F. MANGELS.

MACHINE GUN FOR SHOOTING GALLERIES. APPLICATION FILED APR. 2, 1918.

1,303,702. Patented May 13, 1919.

6 SHEETS-SHEET 3.

W. F. MANGELS.

MACHINE GUN FOR SHOOTING GALLERIES. APPLICATION FILED APR. 2. 19m.

Q i 1 m /7 as f ATTORNEYS W. F. MANGELS.

MACHINE GUN-FOR suoomm GALLERIES.

APPLICATION FILED APR. 2, 1918.

1,303,702. Patented May 13, 1919.

6 SHEETS-SHEEI 5- WI T/VESSES IN VE N TOR 'mlw 1012/11; wm

ATTORNEYS W. F. MANGELS.

MACHINE GUN FOR SHOOTING GALLERIES.

APPLICATION FILED APR. 2, 19w.

6 SHEETS-SHEET 6.

1,303,702. Patented May 13, 1919.

WILLIAM FREDERICK-MANGELS, OF BROOKLYN, NEW YORK.

MACHINE-GUN FOR SHOOTING-GALLERIES.

, T all whom, it may concern:

Be it known that I, \VILLIAH F. MANGELS, a citizen of the United States, and a resident .of the city of New York, Coney Island, bor

ough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Machine-Gun for Shooting-- Galleries, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved machine gun more especially designed for use in shooting galleries and similar establishments and arranged to enable the proprietor of the establishment to quickly place a cylinder or magazine filled with a number of cartridges imposition on the gun and to enable the user to fire the cartridges in rapidsuccession on turning a crank, at the same time permitting the user to aim at distant targets. Another object is to limit the pointing movementofthe gun to prevent damage to the side walls, ceiling or floor of the establishment or injury tobystanders. Another object is to reduce the danger of clogging to a minimum and to insure smooth working of the gun when in action.

With these and other objects in view, the

invention consists of certain novel features of construction, as hereinafter shown and described and then specifically-pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in allthe views.

, Figure 1 is a side elevation of the machine Fig. 2 is anenlarged sectional rear elevation of the same on the line 22 of Fig. 1;

Fig. 3 is an enlarged sectional plan view I of the same on the line 3-3 of Fig. 1, and

showing more particularly the means for limiting the sidewise swinging movement of thegun;

Fig. 4 is an enlarged sectional side elevation of the machine giin with parts in position for firing;

Fig. 5 is asimilar view of the same with the parts iii position after firing;

' Fig. 6 is a sectional front elevation of the same on the line (HG of Fig. 4', with parts of the frame broken away to show the rev.oluble cylinder or magazine;

Fig. 7 is a perspective view of the cam Specificationof Letters Patent.

Patented May 13, 1919.

Application filed April 2, 1918. Serial No. 226,222.

Fig. 10 is a similar view of the centering and locking plate for centering the cylinder or magazine relative to the breech block and holding the cylinder or magazine locked in position during the firing;

-Fig. 11 is a erspective view of the bar for actuating the reech block;

Fig. 12 is a perspective View of the-slip crank shown detached from the shaft carrying the cam mechanisms;

Fig. 13 is a cross section of the same on the line 1313 of Fig. 6; I

Fig. 14 is an enlarged plan view of the machine gun;

Fig. 15 is a developed plan view of the cam for actuating the cylinder or magazine;

Fig. 16 is a sectional front elevation of the device for holding the hammer in inactive position, the section being on 'the line 16-1G of Fig. 1;

Fig.1? is'a sectional side elevation of the same on the line 1717 of Fig. 16;

Fig. 18 is a plan view of the extractor for removing the empty shells from the magazine; and I I Fig. 19 is a sectional side elevation of the same.

The frame 20 o'f'the machine gun is pro vided with a suitable gun stock 21 and with an air-cooled barrel receiver 22 in which is detachably secured a gun barrel 23'by the use of a key 24 and set screw 25, as plainly indicated in Figs. 4 and 5, to permit of quickly removing the barrel 23 in case it becomes too hot, and replacing it by another barrel of like construction. In order to cool the barrel receiver 22 by the surrounding air, use is made of external ribs 26 forming integral cooling memberson the barrel receiver. The frame 20 is provided with a rear sight 27.

,. and a front sight 28 is mounted on the forand cartridge holding bores 31 arranged in a circle on an intermittently rotating magazine or cylinder 32 are adapted to successively register with the barrel bore 30. The magazine 32 is mounted to turn on a-stud 33 fitted to slide in a bearing34 adj ustably secured by bolts 35 to the front of the frame 20, as plainly shown in Figs. 4 and 5, the bolts 35 passing through elongated slots 36 formed in the bearing 34 to permit minute ad ustment of the bearing 34 with a view to insure proper registering of the magazine bores 31 with the barrel bore 30. The bearing 34 contains a spring 37 which presses at one end against a pin 38 held on the stud 33, and the other end of the spring presses against a guide 39 screwing on the bearing 34. The outer end of the stud 33 is provided with a knob or a handle 40 to permit the owner of the shooting gallery or similar establishment to readily pull the stud '33 forwardly out of engagement with the magazine 32 to allow of I removing the magazine after its cartridges have been fired, and to replace such magazine by another filled magazine. The magazine 32 prior to being placed in position on the gun has its bores 31 filled with cartridges 45, that is, a single cartridge 45 for each bore 31. The cartridges 45 have their rims flush with the rear face of the magazine 32, and in order to prevent the cartridges 45 from accidentally dropping I out of the bores 31 during the revolving of the magazine, use is made of a shield 46 forming an integral part of the frame 20 and overlying the rear face of the magazine 32, plainly indicated in Figs. 6 and' 14.

Each cartridge when reaching an uppermost position is adapted to be fired by a firing pin 50 mounted to slide in a breech block 51 which is mounted to slide fonward and backward in bearings 52 arranged with. in the frame 20. The forward end 53'of the breech block 51 is adapted to pass through a cut-out portion 54 formed in the shield 46 to engage the rear face of the magazine 32 directly opposite the barrel 23 thus pressing the upper portion of the magazine'32 in firm contact with the barrel 23 to insure a gas-tight joint between the magazine and the barrel. It will also be noticed that the forward 'end 53 in pressing againstthe back of the magazine 32 provides v a gas-tight joint betweenthe upper portion of the magazine 32 and the breech block at the cartridge 45 to be fired by the firing pin 50. The breech block 51 is moved rearwardly by a pin 55 mounted to slide in arecess 56 formed in the breech block and pressed on by a spring 57 held in the said recess. The outer end of the pin 55 bears against the back -of the'shield 46 to insure a return movement of the breech block 51 after a cartridge is fired, as hereinafter more fully explained.

In order to impart a sliding movement in with a guide slot 63 engaged by a guide pin 64 attached to the frame 20. A spring 65 is attached at one end to the frame 20 and bears with its free end on a screw 66 screwing in one of a series of apertures 67 formed one above the other on the bar 62, The spring 65 tends to slide thebar 62 downward and the tension of thespring 65 can be regulated by adjusting the screw 66 higher up or lower downin the corresponding aperture 67. The bottom 68 of the bar 62 res-ts on the peripheral face of a cam wheel 70 provided with cams or teeth 71 spaced equal distances apart, and the said cam Wheel 70 is fastened by a key 72 or other fastening device to a shaft or a spindle 73 journaled in .hollow trunnions or

bearings

74 and 75 formed on the frame 20 (see Fig. 6). The shaft 73 is provided-at projecting ends with

pins

76, 77, either of which is adapted to be engaged by the cam end 78 of the hub 79 of a slip crank 80 under the control of the user of the machine gun for rotating the shaft 73. The cam end 78 of the slip crank 80 is provided with two

lips

81 and 82 disposed diametrically opposite each other and connected at their bases to two cam faces 83 and 84 to permit of using the slip crank on either end ofthe shaft .73 for slipping engagement with the corresponding

76 or 77 to rotate the shaft 73. It is understood that in case the gun mechanism becomes stuck the slip crank

camfaces

83 or 84 cause the slip crank to slideon thesha-ft 73 without the

lips

81 or 82 turning the shaft 73.

The shaft 73 on being rotated causes the cam 71 of the-cam wheel 70 to raise the bar 62 against the tension of its spring 65 to cause the incline 61 to act on the incline 60 and thus'move the breech block 51 from its normal rearmost position to forward position, as above explained and shown in Fig.

4. When the lower end 68 of the bar 62 drops off the radial face of the cam 71 then shaft 73 by the key 72. The pins 85 nora slot 87 formed in the mally pass through ar 62, but in case the bar lower end of the Ward.

The cam wheel 86 is used for imparting an intermittent rotary motion to the magazine 32 and for this purpose the cam Wheel 86 is provided with peripheral spiral cams or teeth 90 adapted to engage notches 91 formed transversely on the peripheral face of the magazine 32. It is understood that when the cam wheel 86 rotates, the cams 90 intermittently engage successive notches 91 thus intermittently rotating amagazine 32 ,a. distance at each time to move the cartridge holding bore 31 out of register with the barrelbore and to move the next following cartridge holding bore 31 into register with the'barrel bore 30. In practice, the cams or teeth 90 of the cam wheel 86 are made of single pieces having their

ends

92 and 93 secured to the faces of the wheel 86, as plainly shown in Figs. 7 and 15. The ends 92, 93 of adjacent cams 90 are disposed opposite each other andengage two successive notches 91 thus holding the magazine 32 locked while at rest. By the arrangement described one of the cams 90 at least is always in engagement with a corresponding notch 91 to prevent accidental turning of the magazine 32. As shown in the drawings,

the

cam wheels

70 and 86 are provided with four

cams

71 and 90 so that on each revolution of the shaft 73 the breech block 51 is actuated four times and four intermittent movements are given to the magazine 32,

' and thecams 71 and 90 are so arranged one its cam Wheel 70 and bar 62 collar 102 and the lead 101 at the rear end relative to the other that an intermittent movement is given to the magazine 32 at the time the breech block 51 is in retracted position, as shown in Fig. 5, and the breech engagement wi th the rear face of the magazine 32. v

The firing pin 50 is mounted to slide in a bore 100 formed in the breech block 51, and the firing. pin is pressed rearwardly by a spring 101 coiled around the firing pin andresting with one end against the forward 'wall of the bore 100 and pressing against a collar 102 formed on the firing pin, as plainly illustrated in the drawings. A- set screw 103 limits the sliding movement of the firing pin 50 b extending between the magazine 32, as previously explained.

of the firing pin. The outer end of the head 101 is engaged by the upper end 105 of a hammer 106 in the form of a lever extending within the casing 20 and fulcrumed at 107. A spring 108 is attached to the frame 20 and engages the hammer 106 to impart a forward swinging movement to the same. The lower end of the hammer 106 is provided with a plate 109 adapted to be engaged by cams 110 formed on a cam wheel 111 secured by the key 72 to the shaft 73. By reference to Fig. 6, it will be noticed that the cam wheels 70 and 111 are arranged on opposite sides of the cam wheel 86 and these parts are preferably fastened together by screws 112. The cam wheel 111 is the same in construction as the cam wheel 70 but the cam 110 of the cam wheel 111 has released the plate 109 prior to the corresponding cam 71 releasing the bar 62, that is, the firing takes place during the time the bar 62 is held in uppermost position and the breech block 51 is in engagement with tlie t is understood that when the shaft 73 is rotated, a cam 110 engages the lower end of the plate 109 thus imparting a rearward swinging motion to the hammer 106 against the tension of the spring 108,'a.nd when the cam 110 passes off the end of the plate 109 then the hammer is swung forward by the action of its spring 108 to strike the firing pin 50 and thereby push the same forward to fire the cartridge 45 in' register at the time 'with the barrel bore 30. The hammer 106 may be thrown into inactive rearmost position whenever it is desired to do so by the use of an arm 115 secured on a shaft 116 mounted to turn and to slide in the lefthand side of the casing 20, and the said shaft is provided at its outer end with a knob 117 under the control of the'attendant in charge of the establishment. A spring 118 is coiled on the rod 116 intermediate the arm 115 and the casing 20 (see Figs. 6 and 16) to normally hold the knob 117 against the casing 20, and the knob is provided with a pin 119 adapted to engage either of the apertures 113 or 114 formed in the side-of the casing 20to hold the knob 117 and consequently the arm 115 locked against accidental turning movement when in active or inactive position.

In order to properly adjust the incline 61 ofthe bar 62 relative to the incline of the breech block 51, use is made of an adjusting screw 120 screwing in a nut 121 forming part of the casing 20. The inner; end of the screw 120 engages the back of the bar 62, and the rear end of the screw 120 is provided outside of the casing 20 with a knob 122 under the control of the attendant to permit of turning the screw 120 for proper adjustment of the bar 62.

In order to permit the user to swing the vertical slit 132 and lugs 133 and 134 ar-.

ranged on opposite sides of the slit and engaged by a clamping screw 135 which when loosened permits up and down movement of the sleeve 131. When the desired adjustment of the sleeve 131 has been made the clamping screw 135 is screwed up to clamp the sleeve in place in the upper end of the base 130. In the upper end of the sleeve 131 is mounted to turn a cylindrical neck 140 depending from a head 141 resting on the top edge of the sleeve 131. The head 141 is provided on opposite sides with

bearings

142 and 143 in which are mounted to turn the trunnions or

bearings

74 and 75 previously mentioned and formed on the sides of the casing 20, as plainly shown in Fig. 6. The lower end 145 of the frame 20 is made cylindrical with the axis coinciding with that ofthe shaft 73, and on the bottom of this lower end 145 of the casing 20 is arranged a pivot 146 engaged by the eye 147 of a rod 148 extending downward in the neck 140. A spring 150 is coiled on the rod 148 and is seated with its upper end on a flange 151 formed on the head 141, and the lower end of the spring 150 rests on a washer 152 seated on a nut 153 screwing on the lower end of the rod 148. By the arrangement described the spring 150 exerts a downward pull on the casing 20 to hold the

bearings

74 and 75 in firm contact with the

bearings

142 and 143 so that the frame 20 is counterbalanced and may be swung upward or downward to any desired position. The up and down swinging movement of the I frame 20 is limited by stop screw s 160 and 161 screwing in the head 141 and adapted to be engaged by opposite sides of the eye 147 to limit the swinging movement of the frame 20 in either direction thus preventing the user of the gun from pointing too far upward or too far downward to avoid hitting the ceiling'or floor of the shooting gallery by the bullets. It will be noticed that the stop screws 160 and 161 can be screwed farther in or farther out to correspondingly increase or diminish the up or down swinging movement of the frame 20, and the said stop screws 160 and 161 are provided with jam nuts 162 and 163- to lock the stop screws in place after the desired adjustment has been made according to the s ze of the gallery. It will also be noticed that the head 141 is mounted to turn in the sleeve 131 and in order to limit this turning movement of the head, use is made of stop screws 165, 166

screwing in

lugs

167 and 168 formed on the

screws

165 and 166,, and the latter may be screwed in or screwed out to increase or decrease the range of the turning movement of the gun, and when the desired adjustment has been made the stop screws are locked in place by

jam nuts

170 and 171. It is understood that by the arrangement described the user of the gun is not liable to point the gun too far in a sidewise direction for the bullets fired by the gun to strike the side walls of the shooting gallery.

In order to hold the neck 140 of the head 141 from being lifted out of the sleeve 131, use of made of set screws 175 screwing in the sleeve 131 and engaging an annular groove 176 formed in the peripheral face of the neck 140 (see Figs. 4 and 6).

mg 20 is provided with an opening 185 directly abOVe the breech block 51 for the passage of the upper end of the bar 62.

The operation is as follows:

A number of magazines 32 are provided and each is filled with cartridges 45 during the leisure time of the owner or the attendant of the shooting gallery to permit a quick change of the magazines after the cartridges in one magazine have been fired by a customer. In practice, the gun is mounted sufliciently high for the average size of the customers so that a @stomer can readily take hold of the stock. 21 the same as when using and aiming an ordinary gun, and with one hand (either the left or the right) the operator turns the crank 80 and swings the gun proper up or down or sidewise to aim at a distant target. It will be noticed that when the crank 80 is turned a rotary motion is given to the shaft 73 which by the cam wheel 70 moves the bar 62 upward so as to slide the breech block 51 forward into engagement with the magazine 32 at the time the corresponding oppoately after the breech block 51 has moved into engagement with the magazine 32 the cam wheel 111 actuates the hammer 106 so that the firing pin 50 is forcibly pushed forward to fire the cartridge 45 in the bore 31 in register at the time with the barrel bore 30. During the further turning of the.

' mittent rotary motion to the magazine 32 to move the next following bore 31 into register with the barrel bore 30, and then the bar 62 is actuated by the cam wheel 7 O and the above described operation is repeated and a second shot is fired. The customer keeps on turning until the cartridges in the magazine are all fired. The attendant now removes the magazine 32 with the fired cartridges from the machine and replaces it by another magazine filled with cartridges so that the gun is always ready to be fired in the manner above described.

In case the barrel 23 becomes too hot for further safe use after a round of cartridges has been fired, then the barrel is removed from thebarrel receiver 22 and replaced by gathered into a suitable receptacle and are not liable to be scattered about.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a machine gun, a barrel having a bore, a revoluble detachable magazine pro- "ided with bores arranged in a circle and adapted to register successively with the bore of the barrel, the said magazine bores being adapted to be filled with cartridges, a breech block havinga firing pin adapted to fire the cart-ridge uppermost at the time in the magazine, and manually controlled means intermittentlyrotating the said magazine,v moving the said breech block against the said magazine opposite the barrel at the time the magazine is at rest, and actuating the said firing pin at the time the breech block is in-position against the magazine.

2. In a machine gun, a barrel having a bore, a revolu'ble detachable magazine having a plurality of bores each containing acartridge. each bore being adapted to regisanother barrel. This change can be quickly made as it is only necessary for the attendant to retract the set screw 25 and pull out the hot barrel from the receiver and place another barrel in position in the barrel receiver, and then screw up the set screw 25.

In order to enable the attendant to quickly remove the empty shells from a magazine 32, use is made of an extractor 200 in the form of a disk (see Figs. 18and 19). provided with pegs 201 arranged in a circle and corresponding to the cartridge holding bore '31 of the magazine 32. The extractor 200 is provided with a central centering. stud 202 adapted to be engaged by the cen"-;;

tral .opening or bearing 2039f the magazine 32 and which opening normally engages the stud 33 on which the magazine turns intermittently'when in use in the gun, as previously explained. After the cartridges are fired in the gun, the magazine 32 is removed from the gun and replaced by another filled with cartridges. The magazine 32-with the empty shells 204 therein is engaged by the attendant with the extractor 200 (see\Fig. 19) so that the pegs 201 enter the bores 31 from the under side and-push all the empty shells 204 in the magazine s multaneously out of the bores 31, as will be readily understood by reference to Fig. 19. The empty shells can be readily ter with the barrel bore on intermittently ro tating the magazine, a breech block mounted to slide and adapted to engage the said magazine opposite. the said barrel to press the magazine into gas-tight contact with the barrel. a firing pin in the said breech block and adapted to fire the cartridge uppermost at the time and in register with the barrel,

control of the operator for intermittently rotating the said magazine, pressing the said breech block against the magazine and actuating the said firing pin at the time the magazine is at rest and the breech block presses the magazine against the barrel.

3.-In a machine gun, a frame, a barrel mounted on the frame, a magazine mounted .and a crank actuated mechanism under the to turn on the said frame and having bores arranged in a circle and adapted to register successively with the bore of the said barrel, a breech block mounted to slide for- --ward and backwardonthe said frame and ing motion thereto, and manually controlled cam mechanisms, of which one engages the said magazine to intermittently rotate the same and the other controls the said bar for to turn on the said frameand having bores arranged in'a circle andadapted to register successively with the bore of the said barrel, a breech block mounted to slide forward and backward on the said frame and adapted to engage the said magazine opposite the said barrel to press the magazine against the barrel, the said breech block being provided with an incline, a bar mounted to slide up and down on the said frame and having an incline engaging the incline of the said breechblock to impart a sliding motion thereto, and manually controlled cam mechanisms, of which one engages the said magazine to intermittently rotate the same and the other controls the said bar for the latter to move the breech block into engagement with the magazine at the time the latter is at rest, the said cam mechanism for the bar having means to positively return the said bar for releasing the breech block.

5. In a machine gun, a barrel having a bore, a magazine mounted to turn and provided with bores arranged in a circle, the bores being adapted to register successively with the said barrel bore, the magazine-having spaced locking notches, a breech block mounted to slide toward and from the said magazine opposite the said barrel to press the magazine against the barrel, and a centeringand locking plate moving with the said breech block and adapted to successively engage the said notches to center the magazine relative'to the barrel and to lock the magazine against rotation during its period of rest and at the time "the breech block is in engagement with the magazine.

6. Ina machine gun, a frame, a barrel mounted :on the frame and having a bore, a magazine mounted to turn intermittently on the frame and having bores arranged in a circle and adapted to register successivel with the said barrel bore,' a breech block mounted to slide forward and backward on the said frame and adapted to engage the rearface of the magazine at the upper end thereof to press the upper magazine end against the barrel, a sprm -pressed means mounted on the breech bloc and engaging the frame'to' move the breech blockflrearwardly, and manually controlled means for intermittently rotating ..the said magazine and imparting a forward sliding movement to the breech block at the time the magazine is at rest. I

7. In a machine gun, a frame, a barrel attached to the said frame and having a bore, a slidable spring stud on the said frame, a magazine having cartridge holding bores arranged in a circle and adapted to register with the said barrel bore the said magazine being mounted to turd on the said stud and being adapted to be removed from the gun on withdrawin the said stud, a breech block mounted to s ide toward and from the said magazine and ada ted to engage the magazine opposite'the sald barrel to press the magazine intogasti'ght contact with the barrel, a firing pin in the said breech block, and manually controlled-means intermittently rotating the said magazine, moving the said breech block and actuating the said firing pin at the time the breech block is in position against the magazine.

8. In a machine gun, a breech block mounted to slide and provided at one side with an incline, a bar mounted to slide at an angle to the sliding movement of the breech block, the bar having an incline en: gaging the said breech block incline to move the breech block forwardly, and a revoluble cam wheel engaging the said bar 'to impart an intermittent motion to the same.

9. In a machine gun, a breech block mounted to slide and provided at one side with an incline, a bar mounted to slide at an angle to the sliding movement of the breech block, the bar having an incline engaging the said breech block incline to move the breech block forwardly, a revoluble cam Wheel engaging the said bar to impart an intermittent movement to the same, and spring means mounted on the breech block and engaging a fixed part of the gun to return the breech block.

10. In a machine a gun, a breech block mounted to slide and provided at one side with an incline, a bar mounted to slide at an angle tothe sliding movement of the breech block, the bar having an incline engaging the said breech block incline to move the breech block forwardly, a revoluble cam wheel engaging the said bar to impart an intermittent movement to the same, and an adjusting screw screwing ina fixed part of the gun and engaging the said bar to adjustits incline relative to the incline of the breech block.

11. In a machine gun, for shooting galleries, a breech block mounted to slide forward'and backward andprovided at one side with an incline, a spring imparting return movement to the breech block, a sprmgpressed bar mounted to slide up and down and having its upper end provided with an incline engaging the said incline of the breech block to move the latter forward, and a revoluble cam wheel having spaced teeth adapted to engage the lower endof the sald bar to impart an upward movement to the In a machine gun for shooting galleries, a breech block mounted to slide forward and backward and provided at one side ,with an incline, a spring imparting return adapted to engage the lower end of the said bar to raise the latter against the tension of the said spring, another cam wheel having spaced pins adapted to engage the said incline on the lower end of the bar to draw the bore, a ma 'azine having cartridge holding bores space equal distances apart, arranged in a circle and adapted to register with the said barrel bore, the magazine being in the form of a cylinder provided on its peripheral face with grooves spaced equal distances apart and corresponding to the said cartridge holding bores, a stud in which the magazine is removably mounted and adapted to turn, a cam wheel adapted to be turned continually and having spaced peripheral cams adapted to engage the said peripheral grooves of the magazine to intermittently rotate the latter, and a breech block mounted to slide and provided with a firing pin for firing a cartridge in register at the time with the barrel bore, and a centering and locking member on the said breech block and adapted to engage a peripheral groove of the magazine at the time the latter is at rest.

14:. In a machine gun, a frame, a barrel attached to the frame and having a bore, an intermittently rotating magazine mounted on the frame and having cartridge holding bores arranged in a circle and adapted to register successively with the said barrel none of the, cam wheels engagin bore, a breech block provided with a firing pin and mounted to slide forward and backward in and out of contact with the said magazine opposite the barrel, a springpressed bar engaging the breech block, a hammer for firing the said firing pin, a shaft adapted to be turned by the user of the gun,

and cam wheels'secured on the said shaft,

v the said magazine to intermittently rotate 1t, and engaging the said. bar to move the latter positively into inactive position relative to the breech block, another cam wheel engaging the said spring-pressed bar to move the latter upward for shifting the breech block forward, and the third cam wheel engaging the said hammer to actuate the latter at the time the magazine is at a standstill and the breech block is in engagement with the magazine.

15. In a machine gun, a breech block, a I

spring-pressed firing in mounted in the breech block, a spring-pressed hammer adapted to engage the said firi pin, a revoluble cam wheel provided wit spaced cams adapted to engage the said hammer to intermittently actuate the same, a manually controlled throw-out member adapted to engage the hammer to move the latter into inactive position, and lockmgmeans for locking the said throw-out member when in either an active or, inactive position.

WILLIAM FREDERICK MANGELS.